package cn.sinata.wanglin.commonutils;

import android.text.Layout;
import android.text.Selection;
import android.text.Spannable;
import android.text.method.LinkMovementMethod;
import android.text.style.ClickableSpan;
import android.view.MotionEvent;
import android.widget.TextView;

/**
 *
 * Created by liaoxiang on 16/6/15.
 */
public class TextLinkMovementMethod extends LinkMovementMethod {

    public interface TextClickedListener {
        void onTextClicked();
    }

    TextClickedListener listener = null;

    public void setOnTextClickListener(TextClickedListener listen) {
        listener = listen;
    }


    @Override
    public boolean onTouchEvent(TextView widget, Spannable buffer, MotionEvent event) {
        int action = event.getAction();
        if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_DOWN) {
            int x = (int) event.getX();
            int y = (int) event.getY();
            x -= widget.getTotalPaddingLeft();
            y -= widget.getTotalPaddingTop();
            x += widget.getScrollX();
            y += widget.getScrollY();
            Layout layout = widget.getLayout();
            int line = layout.getLineForVertical(y);
            int off = layout.getOffsetForHorizontal(line, x);
            ClickableSpan[] link = buffer.getSpans(off, off, ClickableSpan.class);
            if (link.length != 0) {
                if (action == MotionEvent.ACTION_UP) {
                    link[0].onClick(widget);
                } else {
                    Selection.setSelection(buffer, buffer.getSpanStart(link[0]), buffer.getSpanEnd(link[0]));
                }
                return true;
            } else {
                Selection.removeSelection(buffer);
                if (action == MotionEvent.ACTION_UP) {
                    if (listener != null) listener.onTextClicked();
                }
            }
        }
        return super.onTouchEvent(widget, buffer, event);
    }
}
